Malicious PDF — malware analysis report

Static analysis result for SHA-256 118bcdf18f8ab130…

MALICIOUS

PDF

58.7 KB Created: 2020-12-11 05:07:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 91fe5697ee7f82697c39091c364d4ac5 SHA-1: ab5d16f2a1c67e27cf9c93f5a2f4c4158612ac10 SHA-256: 118bcdf18f8ab1306b2a9c4e640a41fdceacaa9cf0fa387dd0e08effa44aee62
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for redirector links and a link farm. The embedded URLs suggest an attempt to direct users to potentially harmful external sites. While no scripts were explicitly extracted, the presence of numerous links and the ML classifier's high confidence indicate a malicious intent, likely related to phishing or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffine.ru/123?utm_term=noble+wilde+pdf In PDF document text
    • https://buzapakamewogu.weebly.com/uploads/1/3/4/3/134366326/4705750.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f96c5e118dd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366400/normal_5fa239ecc0e91.pdfIn PDF document text
    • https://zulujiporanaru.weebly.com/uploads/1/3/4/5/134590758/4599527.pdfIn PDF document text
    • https://pewarefat.weebly.com/uploads/1/3/4/3/134361746/volatipu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc362cf5687f52b6b9115bf/t/5fcdd8e183d2ac65cc352e72/1607325922044/classlink_forsyth_county_ga.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e6bd3398ff75152e0f70/t/5fc84b6226a3037b4336d80d/1606962025082/zerixet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3e0aef9866f3fd2e6cd3c/t/5fc52070bc819f1cf47cc7ef/1606754419463/2986213990.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5919de2fce462bcaba119/t/5fcc0f902bc7884852a1d29b/1607208850232/scrapit_hb_ltd_hastings.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd39087ad3fe66120e93ba/1606236425151/kejawekagonena.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc53c14116eb00e3c6863a8/t/5fcbd4eeda45e86ccaaeb46a/1607193840222/31040963626.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e99a0a2757459be2ef6a/t/5fc2317c9ee0f32b879c4878/1606562175751/raraxemilisexisunobe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc14748c89e1c4b8fc0f61a/t/5fc32483173fb5383b0a62d0/1606624388286/73291197185.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ad87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD87 4752 bytes
SHA-256: a68161c4ae859d353b0cb15bb7a58b1bcfab4d7629b8e40af51998c0c36dd258
font_01_sfnt_off0000bddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDDB 9752 bytes
SHA-256: aa89cffb16c6efbe36ac8ebaa1659625b582848f3543d0ccaa3a48be4a0b165b

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